借助线下转化，可以实现哪些类型的转化？

Offline conversions track actions that occur outside of a digital platform but are often influenced by online advertising. Retail purchases, where a customer buys a product in a physical store after seeing an online ad, are a classic example. Proactive phone calls, where customers dial a business directly, and event attendance, where individuals physically show up to an event, are also key offline conversions. These metrics are crucial for understanding the full impact of digital marketing efforts on real-world business outcomes. Online purchases, downloads, and website visits are examples of online conversions, not offline. Sales leads can be generated both online and offline, but the option "Sales leads" is too general and doesn't specifically highlight the offline nature of the conversions as effectively as the correct answer.